Meaning of the word bacterium in English

What does bacterium mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

bacterium

US /bækˈtɪr.i.əm/
UK /bækˈtɪə.ri.əm/

Noun

a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some which can cause disease

Example:
Some types of bacteria are beneficial for digestion.
The scientist studied the growth of bacteria in different environments.